sorry, i used “siyuan.mac.txt” to run the application “Hadr3”, the results is not same with yours, here is key information:

Geant4 version Name: geant4-10-07-patch-01 [MT] (5-February-2021)

List of nuclear reactions:

```
neutron + U235 --> N gamma or e- + 2 neutron: 5 Q = 9.7775 MeV
neutron + U235 --> N gamma or e- + 3 neutron: 2 Q = 10.275 MeV
neutron + U235 --> N gamma or e- + 5 neutron: 2 Q = 16.95 MeV
neutron + U235 --> N gamma or e- + neutron: 1 Q = 8.7925 MeV
```

the results from you:

Geant4 version Name: geant4-10-07-ref-05 (31-May-2021)

List of nuclear reactions:

neutron + U235 → N gamma or e- + 2 neutron + Ba144 + Kr90: 1 Q = 181.22 MeV

neutron + U235 → N gamma or e- + 2 neutron + Nb103 + Sb131: 1 Q = 183.31 MeV

neutron + U235 → N gamma or e- + 3 neutron + Pr150 + As83: 1 Q = 177.9 MeV

neutron + U235 → N gamma or e- + 3 neutron + Sr94 + Xe139: 1 Q = 177.94 MeV

neutron + U235 → N gamma or e- + 4 neutron + Ba141 + Kr91: 1 Q = 170.99 MeV

neutron + U235 → N gamma or e- + 4 neutron + Cs138 + Rb94: 1 Q = 177.77 MeV

neutron + U235 → N gamma or e- + 4 neutron + La140 + Br92: 1 Q = 186.8 MeV

neutron + U235 → N gamma or e- + 4 neutron + Sr95 + Xe137: 1 Q = 177.08 MeV

neutron + U235 → N gamma or e- + 5 neutron + Ba144 + Kr87: 1 Q = 180.21 MeV

neutron + U235 → N gamma or e- + neutron + Cs141 + Rb94: 1 Q = 174.73 MeV

i do not kown what cause this huge difference, Geant4 version? my Geant4 is the latest version from official website.

siyuan.out.txt (67.5 KB)